In determining the postmortem interval (PMI), the formula used with body temperature is the Henssge nomogram. Which statement about its application in Indian forensic practice is MOST accurate?
- A The nomogram is only valid if core temperature is taken within 6 hours of death
- B The nomogram uses axillary temperature as its primary core temperature measurement
- C The nomogram assumes a standard body weight of 70 kg; corrections are made for emaciation or obesity via corrective body weight factors ✓
- D Environmental temperature corrections are unnecessary if the body was found indoors
Correct answer: C. The nomogram assumes a standard body weight of 70 kg; corrections are made for emaciation or obesity via corrective body weight factors
Explanation
The Henssge nomogram accounts for the cooling rate of the body using rectal temperature and ambient temperature, but critically applies a corrective body weight (Ck) for clothing, body build, and air movement. A thin emaciated body cools faster (corrective factor <1) while obese or clothed bodies cool more slowly (corrective factor >1). The nomogram can be applied up to approximately 24–30 hours post-death; rectal temperature (not axillary) is used; and environmental temperature correction is mandatory regardless of indoor/outdoor location.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
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Written and medically reviewed by the StethoPrep medical team.